Index: t3lib/class.t3lib_tceforms.php
===================================================================
--- t3lib/class.t3lib_tceforms.php	(revision 9766)
+++ t3lib/class.t3lib_tceforms.php	(working copy)
@@ -4161,7 +4161,7 @@
 	 */
 	protected function getIconHtml($icon, $alt = '', $title = '') {
 		$iconArray = $this->getIcon($icon);
-		if (is_file(PATH_typo3 . $iconArray[0])) {
+		if (is_file(t3lib_div::resolveBackPath(PATH_typo3 . $iconArray[0]))) {
 			return '<img src="' . $iconArray[0] . '" alt="' . $alt . '" ' . ($title ? 'title="' . $title . '"' : '') . ' />';
 		} else {
 			return t3lib_iconWorks::getSpriteIcon($icon, array('alt'=> $alt, 'title'=> $title));